Steel and Composite Structures

  • 제16권4호
  • /
  • Pages.437-454
  • /
  • 2014
  • /
  • 1229-9367(pISSN)
  • /
  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Influence of spacers on ultimate strength of intermediate length thin walled columns

  • Anbarasu, M. (Department of Civil Engineering, Government College of Engineering) ;
  • Sukumar, S. (Department of Civil Engineering, Government College of Engineering)
  • 투고 : 2013.02.04
  • 심사 : 2013.12.17
  • 발행 : 2014.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

The influence of spacers on the behaviour and ultimate capacity of intermediate length CFS open section columns under axial compression is investigated in this paper. The focus of the research lies in the cross- section predominantly, failed by distortional buckling. This paper made an attempt to either delay or eliminate the distortional buckling mode by the introduction of transverse elements referred herein as spacers. The cross-sections investigated have been selected by performing the elastic buckling analysis using CUFSM software. The test program considered three different columns having slenderness ratios of 35, 50 & 60. The test program consisted of 14 pure axial compression tests under hinged-hinged end condition. Models have been analysed using finite element simulations and the obtained results are compared with the experimental tests. The finite element package ABAQUS has been used to carry out non-linear analyses of the columns. The finite element model incorporates material, geometric non-linearities and initial geometric imperfection of the specimens. The work involves a wide parametric study in the column with spacers of varying depth and number of spacers. The results obtained from the study shows that the depth and number of spacers have significant influence on the behaviour and strength of the columns. Based on the nonlinear regression analysis the design equation is proposed for the selected section.

키워드

참고문헌

  1. Anbarasu, M. and Sukumar, S. (2013a), "Effect of connectors interaction in behaviour and ultimate strength of intermediate length Cold Formed Steel (CFS) open columns", Asian J. Civil Eng., 14(2), 305-317.
  2. Anbarasu, M. and Sukumar, S. (2013b), "Study on the effect of ties in the intermediate length cold formed steel (CFS) columns", Struct. Eng. Mech., Int. J., 46(3), 323-335. https://doi.org/10.12989/sem.2013.46.3.323
  3. Anil Kumar, M.V. and Kalyanaraman, V (2010), "Evaluation of direct strength method for CFS compression members without stiffeners", J. Struct. Eng., 136(7), 879-885. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000185
  4. AS/NZS 4600:2005 (2005), "Australian / New Zealand Standard - Cold Formed Steel Structures".
  5. Davises, J.M. and Jiang, C. (1998), "Design for distortional buckling", J. Construct. Steel Res., 46, 174-175. https://doi.org/10.1016/S0143-974X(98)00107-2
  6. Hancock, G.J. (1985), "Distortional buckling of steel storage rack column", J. Struct. Eng., ASCE, 111(12), 2770-2783. https://doi.org/10.1061/(ASCE)0733-9445(1985)111:12(2770)
  7. Kwon, Y.B. and Hancock, G.J. (1992), "Tests of cold formed channel with local and distortional buckling", J. Struct. Eng. ASCE, 118(7), 1786-1803. https://doi.org/10.1061/(ASCE)0733-9445(1992)118:7(1786)
  8. Kwon, Y.B., Kim, B.S. and Hancock, G.J. (2009), "Compression tests of high strength cold-formed steel channels with buckling interaction", J. Construct. Steel Res., 65(2), 278-289. https://doi.org/10.1016/j.jcsr.2008.07.005
  9. Lau, S.C.W. and Hancock G.J. (1990), "Inelastic buckling of channel columns in the distortional mode", Thin-Wall. Struct., 10(1), 59-84 https://doi.org/10.1016/0263-8231(90)90005-J
  10. Narayanan, S. and Mahendran, M. (2003), "Ultimate capacity of innovative cold-formed steel columns", J. Construct. Steel Res., 59(4), 489-508. https://doi.org/10.1016/S0143-974X(02)00039-1
  11. North American Specification (NAS) (2007), "Specification for the design of cold-formed steel members", North American Cold-formed Steel Specification, American Iron and Steel Institute, Washington, D.C., USA.
  12. Schafer, B.W. and Pekoz, T. (1998), "Computational modelling of cold-formed steel: characterizing geometric imperfections and residual stresses", J. Construct. Steel Res., 47(3), 193-210. https://doi.org/10.1016/S0143-974X(98)00007-8
  13. Shi, G., Liu, Z., Ban, H.Y., Zhang, Y., Shi, Y.J. and Wang, Y.Q. (2011), "Tests and finite element analysis on the local buckling of 420 MPa steel equal angle columns under axial compression", Steel Compos. Struct., Int. J., 12(1), 31-51.
  14. Sukumar, S. Parameswaran, P. and Jayagopal, L.S. (2003), "Behaviour of built-up open cross-sections under axial load", J. Struct. Eng., SERC, India, 30(2) 89-94.
  15. Takahashi, K. and Mizuno, M. (1978), "Distortion of thin-walled open section members", Bulletin Jpn. Soc. Mech. Eng., 21(160), 1448-1458. https://doi.org/10.1299/jsme1958.21.1448
  16. Talikoti, R.S. and Bajoria, K.M. (2005), "New approach to improving distortional strength of intermediate length thin-walled open section columns", Electron. J. Struct. Eng., 5, 69-79.
  17. Theofanous, M. and Gardner L., (2011) "Effect of element interaction and material nonlinearity on the ultimate capacity of stainless steel cross-sections", Steel Compos. Struct., Int. J., 12(1), 73-92.
  18. Veljkovic, M. and Johansson, B. (2008), "Thin-walled steel columns with partially closed cross-section: Tests and computer simulations", J. Construct. Steel Res., 64(7-8), 816-821. https://doi.org/10.1016/j.jcsr.2008.01.038

피인용 문헌

  1. Behaviour of partly stiffened cold-formed steel built-up beams: Experimental investigation and numerical validation pp.2048-4011, 2018, https://doi.org/10.1177/1369433218782767
  2. Study on axial compressive behavior of quadruple C-channel built-up cold-formed steel columns vol.70, pp.4, 2014, https://doi.org/10.12989/sem.2019.70.4.499
  3. Structural behavior of intermediate length cold-formed steel rack columns with C-stitches vol.13, pp.4, 2014, https://doi.org/10.1007/s11709-019-0528-4
  4. Investigation of a Method for Strengthening Perforated Cold-Formed Steel Profiles under Compression Loads vol.9, pp.23, 2014, https://doi.org/10.3390/app9235085
  5. Behavior of CFS built-up battened columns: Parametric study and design recommendations vol.74, pp.3, 2014, https://doi.org/10.12989/sem.2020.74.3.381
  6. Parametric study and Improved design guidelines of CFS battened built-up columns vol.40, pp.5, 2014, https://doi.org/10.12989/scs.2021.40.5.733